To use this extension, include ‘sphinxcontrib.zopeext.autointerface’ in your
extensions list in the conf.py file for your documentation.

This provides some support for Zope interfaces by providing an autointerface
directive that acts like autoclass except uses the Zope interface methods for
attribute and method lookup (the interface mechanism hides the attributes and
method so the usual autoclass directive fails.) Interfaces are intended
to be very different beasts than regular python classes, and as a result require
customized access to documentation, signatures etc.